Messages in this thread | | | From | "Bae, Chang Seok" <> | Subject | RE: [PATCH 14/15] x86/fsgsbase/64: Support legacy behavior when FS/GS updated by ptracer | Date | Thu, 22 Mar 2018 21:17:49 +0000 |
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________________________________________ From: Andy Lutomirski [luto@kernel.org] Sent: Thursday, March 22, 2018 09:53 >>> But your patch doesn't actually do this, since gdb will just do >>> SETREGS anyway, right? >> GDB does SETREGS on any exclusive (FS/GS) updates in inferior call.
> This means that your patch has exactly the same effect as the code in > my git tree, right? Then let's stick with something like what's in my > git tree, since it's far simpler.
Difference is if flipping FS/GS multiple times, user may check the base from LDT. But I don't have strong will to keep arguing this; Markus or somebody might want to say something.
The whole point as I understand is to avoid any regression on legacy ptracers. If a strong confidence lies on the simple version, let me. My first thought bought this in fact.
Thanks, Chang
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